Central diabetes insipidus happens when damage to a person's hypothalamus or pituitary gland causes disruptions in the normal production, storage, and release of vasopressin. 1  The disruption of vasopressin causes the kidneys to remove too much fluid from the body, leading to an increase in urination.
Foreign national A foreign national is a person who is not a citizen of the host country in which he or she is residing or temporarily sojourning. For example, a foreign national in Canada is someone who is neither a Canadian citizen nor a permanent resident of Canada. However, in the European Union, a foreign national is a third country national, i.e. someone who is not a citizen of any of the member states of the European Union.
This foreign state is known as the Host Nation (HN) under US (and generally accepted NATO) doctrine. The term counter-insurgency is more commonly used worldwide than FID. FID involves military deployment of counter-insurgency specialists. According to the US doctrinal manual, Joint Publication 3-22: Foreign Internal Defense (FID), those specialists preferably do not themselves fight the insurgents.